Hi! For the past 3 or so days I have been experiencing a jumping sensation in my right side when I am nearly at the top of my breathing and when I am exhaling at the same point. This sensation has the ability to go closer to my back or go closer to my chest, but remains in the right side of my upper body. A possible reason for this is that I had an intense back workout on this last Saturday without stretching properly. I just want some insight into what exactly this is and how I should go about dealing with this problem.